Finding keyholes in metals 3D printingNew research published today in Science, led by researchers from Carnegie Mellon University and Argonne National Laboratory, has identified how and when these gas pockets form, as well as a methodology to predict their formation -- a pivotal discovery that could dramatically improve the 3D printing process.

A tasty Florida butterfly turns sourA 15-year study led by University of Arizona entomologist Katy Prudic found that, when living apart from the unsavory bug it mimics, the viceroy butterfly becomes yucky, making biologists rethink old theories about animal mimicry.

#514 Arctic Energy (Rebroadcast)This week we're looking at how alternative energy works in the arctic. We speak to Louie Azzolini and Linda Todd from the Arctic Energy Alliance, a non-profit helping communities reduce their energy usage and transition to more affordable and sustainable forms of energy. And the lessons they're learning along the way can help those of us further south.